Aggregate – Any of several hard materials such as crushed
rock, sand, gravel, stone, slag, cinders or other inactive materials.
Asphalt – A brown or black tarlike substance
mixed with sand or gravel and used for paving, roofing, etc.
Ballast – Gravel or broken rock placed in a railroad bed.
Cement – A powdered substance of lime and clay, mixed with
water and sand to make mortar (an adhesive) or with water, sand
and gravel to make concrete.
Crusher – A machine that breaks rock into smaller pieces
by crushing it like a jaw or spinning it in a circular motion at
Granite – A hard rock consisting chiefly of feldspar and
Gravel – A loose mixture of pebbles and rock fragments
that are coarser than sand.
Greensite – A parcel of undeveloped land designated for
Limestone – A sedimentary rock composed of calcium carbonate,
formed by the accumulation and recrystallization of seashells which
have gone through some degree of change so that the shells are not
Muck Pile – Blasted rock in the pit, which is ready to
be taken to the primary crusher.
Ready Mixed Concrete – A hard building material made of
sand and gravel, bonded together with cement.
Riprap – Large pieces of rock (usually 6 to 30 inches in
diameter) which have undergone only primary crushing and sizing,
or larger, uncrushed pieces. Riprap is used to stabilize slopes
and shorelines and construct erosion-control structures.
Sand – Loose, gritty grains of disintegrated rock, as on
beaches, in deserts, etc.
Screen Media – A wire mesh screen used for sizing stone
in the processing plant.